Draft pipe for heaters



Dec. 2 24. 1,511,134

J.'W. JONES DRAFT PIPE FOR HEATERS Filed April 18 1922 INVENTOR.

A TTORNEYS.

Patented Dec. 2, 1924.

. UNITED STATEfi PATENT FFlCll.

JOHN W. JONES. OF SYRACUSE, NEW YORK, ASSIGNOR T0 SYRACUSE RADIATOR COM- PANY, INC., OF SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK.

DRAFT PIPE FOR HEATERS.

Application filed April 18, 1922.

To all whom it may concern:

Be it known that 1, JOHN W. Jones, a citizen of the United States, and a resident of Syracuse, in the county of Onondaga and State of New York, have invented a certain new and useful Draft Pipe for Heaters, of which the following is a specification.

This invention relates to heaters and has for its object a particularly simple, efficient and compact arrangement of the draft and check dampers in the draft pipe and a particularly simple arrangement of the oper ating means therefor. It further has for its object a particularly simple, compact and elficient draft pipe or draft pipe unit with draft and check dampers therein, which unit can be readily applied to heaters and the thermostatic regulators associated with the heaters.

The invention consists in the novel features and in the combinations and constructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanying drawings in which like characters designate corresponding parts in all the views.

Figure 1 is an elevation, partly in section, of this draft pipe unit showing the same applied to a heater.

Figure 2 is a fragmentary plan view of parts seen in Fig. 1, parts being omitted.

This invention comprises a draft pipe provided with a transverse smoke chamber having an inlet in its lower side, and an outlet in its upper side, and a cold air passage in one of its lateral sides, a draft damper for controlling the air passage, and means lo cated entirely outside of the draft chamber and draft pipe for operating the dampers.

1 designates the heater which may be of any suitable form, size and construction, the heater here shown being of the type for heating the water of a hot water circulating system and having a thermostatic or other device operating by the temperature or ex pansion and contraction of the water due to increase and decrease of the temperature of the water in any well known manner. The heater here shown is provided with a water jacket 2 and has a combustion chamber extending into a dome-shaped top from which leads the outlet or smoke pipe.

3 designates the draft pipe unit which is in the form of an elbow having an upwardly extending portion 4: provided with a Serial No. 555,126.

transverse smoke chamber 5 having an inlet 6 for the products of combustion in its lower side, and an outlet 7 in its upper side and also having a cold air inlet passage 8 in one of its lateral sides.

9 is a draft damper for controlling the inlet 6 and 10 a check damper for controlling the cold air passage 8.

Preferably, the transverse smoke chamber 5 is of greater diameter than the inlet 6 so that an annular space is provided around the inner end of the inlet 6 and also the cold air opening 8 is located on the inner side of the chamber 5 toward the heater and is of the same width and height as the smoke chamber including said annular space. The annular space increases the sensitiveness of the cold air check as the air has substantially free and unobstructed passage to the outlet of the smoke box or chamber.

The damper 9 is here shown as a pivoted damper of the butterfly type, mounted upon a rock shaft 11 which extends to the outside of the chamber, the rock shaft having a crank 12 at its outer end. This shaft 11 preferably extends diametrically of the inlet and is journaled in bearings 13 formed in an upwardly extending angular flange '14: within the chamber 5 in line with the inlet 6, and said shaft preferably extends substantially in a line extending centrally along the bottom of the chamber through the cold air passage 8 so that the crank is on the outside of the chamber 5 opposite to that on which the check valve 10 is located.

The check valve 10 is a flap valve pivoted at 15 at its upper edge on the outer side of the top wall of the chamber 5.

The operating means comprises a thermostatic device 16 of any suitable construction, operated by the pressure or the temperature of the water in the jacket 2 of the heater, it being connected to said jacket by a pipe 17, and a lever 18 pivoted at 19 to lugs on the casing of the thermostatic means 16 and operable by a movable part or rod connected to a movable part of the thermostatic means within the casing of such means, as will be understood by those skilled in the art, and connections between the lever 18 and the crank 12 and between such lever and the check valve 10.

These connections are here shown as flexible connections as chains connected to the arm 20 of the lever 18, the chain connected to the crank being connected to a lateral angular extension 21 of the arm of the lever, the angular extension being around the pipe connected to the outlet 7 of the smoke chamber 5. The lever is also provided with a weight 24; and also the crank 12 is provided with a weight 25. The angle of the crank 12 is such that when the lever arm 20 rises or falls, it closes the draft damper and opens the check damper and vice versa. The lever arm 20 is here shown as a rod or bar detachably and slidably connected to the lever 18. However, in so far as this invention is concerned, the lever 18 and arm 20 are practically one lever. The pipe 17 extending centrally from the top or dome of the heater, and hence the lever arm 20 extends radially of the heater in a vertical plane extending centrally of the smoke chamber 5 and cold air inlet, and the angul'ar extension 21 of the arm 20 extends around the smoke pipe mounted on the top of the smoke chamber.

iVhat I claim is:

1. In a heater, a draft pipe, having a transverse smoke chamber provided with a smoke inlet at its lower side, and a smoke outlet at the upper side, and an air passage in one of its lateral sides, dampers for controlling the smoke inlet and the air passage respectively, and means for operating the dampers comprising a lever and individual connections between one of the arms of the lever and the dampers respectively, said connections being located entirely on the outside of the draft pipe and the transverse chamber.

2. In a heater, a draft pipe formed with a transverse smoke chamber having a smoke and an additional connection between the same arm of the lever and the check damper, substantially as and for the purpose described.

3. In a heater, a draft pipe formed with a transverse smoke chamber having a smoke inlet in its lower side, a smoke outlet in its upper side and an air passage in its inner side toward the heater, a draft damper for controlling the inlet, a rock shaft on which said damper is mounted extending through the side of. the chamber opposite the cold air passage, the rock shaft having a crank at its outer end, a check damper for controlling said passage, and means for operating the damper comprising a lever, a connection between the lever and the check damper, the lever having a lateral angular extension, and a connection between said angular extension and the crank of the draft damper.

In testimony whereof, I have hereunto signed my name, at Syracuse, in the county of Onondaga, and State of New York, this 24th day of December, 1921.

JOHN W. JONES. 

